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Hello and welcome to Just answer.com, Super mechanic here. About your vehicle.
Let me give you the times for the,
1. Front crankshaft seal, (that is in the timing cover)
2. The timing cover gasket itself
3. The valve cover gasket
And whoa...I didn't see that at first. In fact, there has been a service bulletin on the front seal. Normally a computer test will not detect any warning light system malfunctions.
Bulletin No.: 04-06-01-009A
Date: November 01, 2005
Subject:Oil Leak from Engine Front Cover Crankshaft Oil Seal During Extremely Cold Weather (Replace Crankshaft Front Oil Seal)
Models:2002-2005 Chevrolet Cavalier2004-2005 Chevrolet Classic2004-2005 Chevrolet Malibu2005-2005 Chevrolet Cobalt2002-2004 Oldsmobile Alero2002-2005 Pontiac Grand Am, Sunfire2005-2005 Pontiac Pursuit (Canada Only)2000-2005 Saturn L-Series2002-2005 Saturn ION, VUE
with 2.2L Ecotec Four-Cylinder Engine (VINs D, F - RPO L61)
This bulletin is being revised to add additional models and model years, update the information and title, and correct the Parts Information. Please discard Corporate Bulletin Number 04-06-01-009 (Section 06 - Engine Mechanical).
Some customers may comment on an oil leak from the front engine cover crankshaft oil seal during extremely cold weather.
During extremely cold weather, moisture at the engine crankshaft balancer may freeze to the crankshaft front oil seal, which may result in the oil seal being torn when the engine is started.
Replace front crankshaft oil seal with a new service part, P/N 12584041, which is constructed of an improved sealing compound that is not susceptible to freezing. Refer to the service procedure in this bulletin to replace the front crankshaft oil seal.